The Princess Royal

Princess Royal Li Rong and Prime Minister Pei Wen Xuan are husband and wife, but they're not in a harmonious state. They also have different political views. Emperor Li Chuan of the Great Xia is in danger of death due to elixir poisoning, and it's urgent to appoint a crown prince. Li Rong advocates that the son of Empress Shangguan Ya be the crown prince, while Pei Wen Xuan insists on supporting the son of Concubine Qin Zhen Zhen to inherit the throne. The two, who have been living separately, will be at loggerheads again because of this matter when they meet.